What you need:
- White vinegar
- Take the humidifier apart and pour out any water from the base and the holding tank. (Check the instructions/manual that came with your humidifier for specific instructions on taking your unit apart)
- Put vinegar in both the base and the tank. Most bases can be cleaned then with a toothbrush. If there is mildew buildup you may want to let the vinegar sit overnight and then rinse it and let it dry and air out the next day. A longer sit time with the vinegar will kill a vast majority more of the mold and mildew.
Some humdifiers have removeable pieces that can be put in the dishwasher. Check your manual and if yours is one those pieces can then be easily cleaned going that route (or have that as an added step after the vinegar is removed to more quickly let the smell of vinegar disapate). Don’t worry, the smell of vinegar will disapate just by sitting in the air.